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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 107, No. 7, 2012, pp. 867-872
Bioline Code: oc12186
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 107, No. 7, 2012, pp. 867-872

 en Biogeographical aspects of the occurrence of Nyssomyia neivai check for this species in other resources and Nyssomyia intermedia check for this species in other resources (Diptera: Psychodidae) in a sympatric area of the Brazilian savannah
Saraiva, Lara; de Lima Carvalho, Gustavo Mayr; de Castilho Sanguinette, Cristiani; de Carvalho, Deborah Aparecida Alves & Filho, José Dilermando Andrade

Abstract

Nyssomyia intermedia check for this species in other resources and Nyssomyia neivai check for this species in other resources constitute a species complex associated with Leishmania check for this species in other resources transmission. The aim of this study was to analyse the ecological profiles of the Ny. intermedia and Ny. neivai populations in a sympatric area in the Brazilian savannah along the banks of the Velhas River. Captures were performed from July 2003-June 2005 in two distinct environments: a gallery forest with various degrees of anthropogenic modification and animal shelters. A total of 20,508 Ny. neivai (86%) and Ny. intermedia (14%) sandflies were collected. The dif- ference between the proportions of the sandflies that were collected (Ny. neivai/Ny. intermedia) per bank was signif- icant. The right bank presented a greater number of sandflies (65%) and more preserved vegetation. The abundance of Ny. neivai was higher than that of Ny. intermedia on both banks. The results demonstrate that anthropic activities can affect the sandfly populations in this area, thereby leading to a reduction in species abundance. Nevertheless, the environments with higher levels of antropogenic modification displayed sandfly population numbers that favour the Leishmania transmission cycle.

Keywords
Nyssomyia intermedia - Nyssomyia neivai - Brazilizian savannah - Velhas River

 
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